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JPS5662499

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DESCRIPTION JPS5662499
Description l1 Title of the Invention
Moving plate for speaker and manufacturing method thereof
8. Detailed Description of the Invention The present invention relates to an imaging plate for a
speaker made of a modern material and a method of manufacturing the same. In a general
speaker, a voice coil connected to a diaphragm is disposed in a magnetic gap formed in a
magnetic circuit, and the voice coil and the voice coil are transmitted six times in one stream of
signal. The connected diaphragm reciprocates to generate ffIL. In a new type of loudspeaker, in
order to obtain a faithful reproduction sound, a diaphragm that can reciprocate the entire
diaphragm over a wide i-wave number band is necessary, and such a diaphragm is lightweight
and hard. The higher the material is, the more advantageous it is. · This is because the Young's
modulus ■ has a large density? The smaller the ratio is, the larger the specific elastic modulus
17P represented by the ratio of Young's modulus and solid P, and the higher the 1st resonance
frequency in proportion to 陣 PK, so that the whole S moving plate can be recommended one
weight This is because the bandwidth is expanded. For the moving plate for speakers used
conventionally. A natural fiber such as pulp, or a synthetic fiber such as polyester fiber mixed
with the natural fiber to form a paper, or a natural fiber of a kernel mixed with a high elastic
fiber such as carbon dk 佳 or metal 1 fiber There is something. These EndPage: 1 diaphragms are
formed by entanglement of natural fibers and high-elasticity fibers, so they have the advantage
that internal friction becomes large and the resonance beak is alleviated, while high-elasticity
fibers are used The purpose to increase specific modulus PI / PI, which is the original purpose,
was not to be expected. Also, in recent years, metal materials such as aluminum, titanium and
beryllium have been used as diaphragms for speakers), these metal materials are formed as they
are as diaphragms, or 1 synthetic resin film etc. A metal material is added by vapor deposition or
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the like to form a diaphragm. As described above, it is possible to obtain a diaphragm having a
high ratio of ratio as compared with the above-described diaphragm consisting of a combination
of a natural fiber and a high elastic fiber by the fact that a metal material is used. Density 1 and
Young's modulus 鵞 and specific modulus 17P and t of various metal materials as mentioned
above ! Shown in 1. As is apparent from Table 1 below, beryllium and polon have extremely large
specific elastic modulus against the 4t @ material of the pond, but to use as a diaphragm, The
brittleness is a disadvantage, and there is a large separation α in production, which is
disadvantageous in terms of 14 years in practical use. Further, in the case of beryllium, since it
has strong toxicity, great care is given to its handling. The present invention has been made in
view of the point #i, and it is a bird's-eye view of Svy tJII11 which is composed of a poronaluminum complex mainly composed of the above-mentioned poron.
The following description will explain the drawings # for a poron-aluminum composite used as a
Kwi moving plate. The boron fiber (1) shown in FIG. 1 has a thickness of about 10 to 80 μm on a
surface of a core wire (2) consisting of a tungsten wire having a diameter of about 5 to 50 voices
by vapor deposition. It is deposited. The diameter of this poron fiber (1) is about 55 to 190 μs 1
and an arbitrary fiber is obtained, which becomes a high elastic fiber having a specific elastic
modulus about 6 times that of glass fiber. The polo / fiber (1) t # i2 obtained as a new machine is
cut to about <10 W as shown in the figure and placed in a layer on an aluminum foil (4) with a
thickness of 5 to 100 μm to make an acrylic adhesive Fix with agent (5). As shown in the figure,
a few sheets of the aluminum foil (4) to which the POYW * fibers are attached are laminated, the
aluminum foil (4) is adhered to the liquid upper layer, and heated to about 570 ° C. in vacuum.
As a result, the acrylic adhesive (5) is removed from the laminate. Next, when the laminated body
having the configuration shown in FIG. 2 is pressure-heated and formed at a temperature of 524
° C. under a pressure of 20 to 50 $ / j in a mold having a desired shape, tapping 1 ruinicum foil
shown in FIG. (4) is melted to embed the poron fiber (1) to obtain a poa / .aluminum composite
(6) integrally bonded. Incidentally, such a method for producing the Poron-Aluminum direct
combination is developed by IAVCO. In the present invention, the number of laminated aluminum
foils (4) to which the above-mentioned Poron fibers (1) are attached is selected so as to obtain a
plate thickness suitable for the diaphragm, and the product 1 previously cut into a necessary
shape The body is pressure-heated and formed into a diaphragm shape using a mold. The
diaphragm made of the porous aluminum decomposing body 6) formed as described above has a
density P of 2.5 y / a, and a Young's modulus wing of 200 × 10 10 y / scratch 1 e 02, and its
specific elastic modulus W / P is 80x1 (F'aj / sea). The ma of this specific elastic modulus is
about five times the specific elastic modulus (shown in FIG. 1) of aluminum used for the
conventional speaker diaphragm, so the first four SW4 wave numbers are greater than the
conventional diaphragm. It is about 1.7 times higher. The n wave number band in which the
diaphragm can vibrate integrally is expanded. Furthermore, as the speaker diaphragm, it is
desirable that EndPage: 2 be uniform so that the physical properties are uniform in order not to
generate distortion in the reproduction rod. Therefore, in the diaphragm using the poron-
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aluminum composite according to the present invention It is also necessary to make their
physical properties uniform. In order to achieve this purpose, a new view of the speaker
diaphragm is shown in FIG. 4 as means tml for giving uniform physical properties to the PoronAluminum composite.
In the polon-aluminum complex (6) Li shown in the figure, the aforementioned polon fibers (1)
are arranged and embedded in a grid shape in the aluminum foil (4), to form this complex. First,
the above-mentioned boron fibers (1) are longitudinally aligned and adhered on an aluminum foil
(4). Furthermore, boron fibers (1) are aligned and adhered in a lateral force direction on this, and
an aluminum foil (4) in which boro / fibers (1) are arrayed and adhered in a lattice is laminated
and formed. As another method, a suitable number of aluminum foils (4) t in which wax and
boron fibers (1) are arrayed and bonded in one direction may be laminated such that the
direction of arrangement of the poron fibers (1) intersects at a right angle . If the laminate made
in this way is made into a diaphragm, pressured heating acid and cedar in the shape according to
the above-mentioned process, the boro / fiber (1) will be arrayed and embedded and the
ninepolon aluminum composite The speaker diaphragm is made of In the new speaker
diaphragm, horn fibers are arranged in a grid and bonded in the aluminum foil, so that it is
released to various parts of the diaphragm and the physical properties such as the directionality
of density and elastic modulus become uniform. . Since the diaphragm for loudspeakers of the
present invention is formed into a diaphragm shape by bonding a poron fiber in an aluminum foil
by embedding it in an aluminum foil, it is fragile even though it has a high specific elastic
modulus conventionally. Can be used as a boron t-boro /. · Aluminum complex that could not be
used as a speaker diaphragm, and the specific modulus is higher than that of a conventional
speaker diaphragm using a metal material such as aluminum. As a result, the entire diaphragm
can be reciprocated over a wide frequency range T / c, resulting in a wide latency speaker.
Furthermore, since the above-mentioned Poron-Aluminum complex is composed of grid-like
arrayed Poron fibers embedded in and bonded to an aluminum foil, this complex exhibits
uniform physical properties as a whole, and vibration for loudspeakers By using it as a board, it is
possible to obtain a reproduction it without distortion. Further, in the speaker diaphragm of the
present invention, the boron is obtained by vapor-phase growing a poron on the surface of a core
wire made of tungsten fiber to obtain a boron fiber, and the poron fiber is placed and bonded on
an aluminum foil, and the polon fiber is placed and bonded. Since the foil is laminated in multiple
layers and pressure-heated and formed into a diaphragm shape, it is manufactured by pressureand-heat molding with a diaphragm-shaped mold to obtain a poron-aluminum composite and at
the same time It is possible to easily form the composite into any diaphragm shape. As is
apparent from the above effects, the present invention easily realizes a speaker diaphragm
having a high specific modulus using boro / fiber, and this diaphragm is a faithful reproduction
tt-vibrator vibration for a speaker. It is very useful as a board.
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4. Brief Description of the Drawings FIG. 1 is a cross-sectional perspective view of a boro / fiber
used in the present invention, FIG. 42 is a cross-sectional view of a laminate showing a process of
manufacturing a composite used in the present invention, and FIG. FIG. 4 is a cross-sectional
perspective view of another embodiment of the composite used in the present invention, and (1)
is a boro / fiber. (2) shows the core li% (4) an aluminum foil, and (6) shows a poron / aluminum
composite, respectively. Patent Applicant Sanyo Tatsumi Co., Ltd. Representative Ige Tei
EndPage: 3
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